It is possible to become a real estate agent in six months depending on the place where you live. It also depends on how much you dedicate to the process.
In general, you will need to earn a license using a relicensing course and an exam.
Then, you will need to activate your real estate license and then join a brokerage.
Although getting into the field is relatively easy, there is still an upfront cost, which might vary depending on your location.